Bicycle-frame.



No. 666,!87. Patented Jan. l5, IQOI.

J. S. DIKEMAN.

BICYCLE FRAME. {Application filed Mar. 7, 1900.

(No Model.)

[.VVENTOR [VI IYVIZSSES aA/tarney TNITED STATES PATENT OFFICE.

JOSEPH S. DIKEMAN, OF TORRINGTON, CONNECTICUT, ASSIGNOR OF ONE- HALF TO CHARLES S. DIKEMAN, OF SAME PLACE.

BICYCLE-FRAM E.

SPECIFICATION formingpart of Letters Patent N 0. 666,187, dated January 15, 1901.

Applica'tionfiled March 7, 1900. Serial No. 7,660. (No model.)

To all whom it may conc rn: hereby are drawn together and by turning Be it known that I, JOSEPH S. DIKEMAN, of it in the other direction the parts are sepa- Torrington, in the county of Litchfield and rated or moved away from each other. State of Connecticut, have invented certain The lower ends of the tubes 9, constituting 5 new and useful Improvements in Bicyclethe members of the rear fork, are connected Frames; and I do hereby declare the followin the usual manner to the rear stays or rear ing to be a full, clear, and exact description sections of the reach. (Not shown.) of the invention, such as will enable others The rear projection 8 of the forging 5 is skilled in the art to which it appertains to machined internally to snugly receive the 10 make and use the same. seat-post-clamping block 19. This block 19, My invention relates to an improvement in which is preferably made hollow in order to bicycles; and it consists in a connection for reduce the weight, is closed at one end, and securing the rear fork in place and also lockthis closed end is grooved at an angle, so as ing the seat-post in proper position. to bear solidly against the rear face of the 15 My invention further consists in the parts seat-post 12 and also at its sides, and thus and combinationsofparts,aswill be more fully bind the post between the front of the forgdescribed, and pointed out in the claims. ing 5 or the reinforcing part 10 inside said In the accompanying drawings, Figure 1 is forging and the block 19. The upper end of a view, partly in section, showing the coup the crown 15 of rear fork 9is slightly reduced 2o lingand seat-postlock. Fig. 2 is aviewshowin diameter, so as to enter within the projecing the clamping-block. Fig; 3 is a view in tion 8 and bear against the rear end of block elevation of the coupling-sleeve, and Fig. 4 19. Hence it will be seen that by turning is a View showing the upper end of the rear the sleeve in one direction the crown 15 is fork. moved away from the projection 8,thus loosen- 7 5 25 3 represents the backbone or top tube, and ing the block 19 and permitting the seat-post 4 the seat-supporting tube united by forging 12 to be adjusted or removed, and by turning 5, to which the tubes are preferably brazed. it in the opposite direction the parts are The forging 5, which unites the tubes 3 and locked against movement. It will also be 4, is provided with three projections 6, 7, and seen that the rear fork can be disconnected 8o 0 8, so arranged as to aline with the tubes 3 entirely from the forging 5, and the rear stays and 4 and the rear fork 9 and is brazed or or reaches from the bottom bracket, thus perotherwise secured to the tubes 3 and 4 and mitting the machine to be packed in a small is detachably connected to the fork 9, as will compass for exportation hereinafter be explained. I prefer to secure The sleeve 14 is preferably provided with 5 a reinforcing-piece 10 to the forging 5 to enan angular surface, as shown, to engage a ter the tube 4; but this is not essential, as wrench or spanner, or it may be milled or the tube 4 can be brazed direct to (and to the roughened so as to permit it to be turned by outside or inside of) the projection 7. The hand. portion 11 of this forging or the interior of Itis evident that many slight changes might 9o 40 the reinforcingpiece 10, which constitutes be resorted to in the relative arrangement of the seat-post socket, is machined internally parts herein shown and described without deto make a snug fit for the seat-post 12, while parting from the spirit and scope of my inthe rear projection 8 of the forging is extervention. Hence I would have it understood nally threaded to receive or engage one end that I do not wish to limit myself to the eX- 5 of the female-threaded sleeve 14. The opact construction herein shown and described;

posite end of this sleeve 14 is provided with but, threads to engage the crown 15 of the rear Having fully described my invention, what fork 9, the threads in one end of the sleeve Iclaim as new, and desire to secure by Letters 14: being right hand and the threads in the Patent, is 50 other end left hand, so that by turning the l. The combination with the front section sleeve in one direction the parts connected of a bicycle-frame having a seat-post socket and a projection in rear of the socket, of the rear fork, a female threaded sleeve connect.- ing said projection and the rear fork and means actuated by the rotation of said sleeve for clamping the seat-post in the socket.

2. The combination with the front section of a bicycle-frame having a seat-post socket,

and a hollow projection in rear of said socket, of a rear fork, a clam ping-block located within said hollow projection and resting in contact with the upper end of said rear fork, and a screw-threaded sleeve mounted on the rear fork and the hollow projection and adapted to force the end of the rear fork against the clamping-block.

3. The combination with a seat-post tube and a rear fork, of aclamping-block carried by the tube and resting against the upper end of the rear fork, and means for forcing thelatter against the block, for clamping the seat-post within the tube.

4:. The combination with a seat-post socket, 1

and a seat-postclamping block therein, of a rear fork the upper end of which is adapted to bear against said block, and means connecting the socket and fork for drawing the latter against the block.

5. The combination with a seat-post socket having a rear projection screw-threaded externally, and a seat-post-clamping-block located Within said projection, of a rear fork the end of which projects within the project- 

